package main

import (
	"fmt"
	"os"
	"strings"
	"unicode"
)

func main() {
	str := ""
	if len(os.Args) > 0 {
		str = os.Args[1]
	}
	for _, r := range str {
		if unicode.Is(unicode.Han, r) {
			str = strings.Replace(str, string(r), "*", -1)
		}
	}
	fmt.Print(str)
}

